Combi Boilers

Loading Image
Combi boilers combine a boiler with a water heater in a highly-efficient and space-saving package. Since combi boilers are also easy to install and simple to service, they have become one of the most popular systems on the market today.
Filter By
  • Best Selling
  • Price: Low to High
  • Price: High to Low
  • Name: A-Z
  • Name: Z-A
  • Recommends Only
  • Closeouts Only
  • In-stock Only
  • Next Day Air Only
  • Availability
Model Number FS-120 COMBI is a Hot Seller
Learn More About Williamson-Thermoflo FS-120 COMBI
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 109K BTU DOE Capacity, 94K BTU Net IBR Capacity. Includes Circulator.
Model FS-120 COMBI is a Closeout
Closeout
$1,999.00
Was 
$2,439.00
SAVE $440.00
Only 1 In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Model Number NRCB199DV-LP is the Number 1 Seller
Learn More About Noritz NRCB199DV-LP
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 111K BTU DOE Capacity, 97K BTU Net IBR Capacity. Includes Circulator.
13% Buy This
$2,329.00
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Model Number ZWB28-3 is the Number 2 Seller
Learn More About Bosch Thermotechnology ZWB28-3
Model ZWB28-3 is a Recommended Product
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 101K BTU Gross Input, 89K BTU DOE Capacity, 79K BTU Net IBR Capacity. Includes Circulator.
10% Buy This
$1,899.00
Factory-Direct
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Model Number 383100050 is the Number 3 Seller
Learn More About Weil-McLain 383100050
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 155K BTU Gross Input, 144K BTU DOE Capacity, 125K BTU Net IBR Capacity. Includes Circulator.
6% Buy This
$2,332.00
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Model Number INS199C is the Number 4 Seller
Learn More About Triangle Tube INS199C
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 199K BTU Gross Input, 184K BTU DOE Capacity, 159K BTU Net IBR Capacity. Includes Circulator.
6% Buy This
$2,299.00
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Model Number M090CN is the Number 5 Seller
Learn More About Rinnai M090CN
Rinnai
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 90K BTU Gross Input, 84K BTU DOE Capacity, 73K BTU Net IBR Capacity. Includes Circulator.
6% Buy This
$2,716.35
Only 3 In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Bosch Thermotechnology ZWB42-3
Model ZWB42-3 is a Recommended Product
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 152K BTU Gross Input, 134K BTU DOE Capacity, 117K BTU Net IBR Capacity. Includes Circulator.
6% Buy This
$2,649.00
More On The Way
Shipping Icon
Coming Soon!
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Weil-McLain 383900151
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 150K BTU Gross Input, 139K BTU DOE Capacity, 121K BTU Net IBR Capacity. Includes Circulator.
6% Buy This
$3,320.00
Only 3 In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Weil-McLain 383900152
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 199K BTU Gross Input, 184K BTU DOE Capacity, 160K BTU Net IBR Capacity. Includes Circulator.
6% Buy This
$3,795.00
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Rinnai M120CN
Rinnai
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 112K BTU DOE Capacity, 97K BTU Net IBR Capacity. Includes Circulator.
6% Buy This
$2,791.75
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Noritz NRCB180DV-LP
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 100K BTU Gross Input, 92K BTU DOE Capacity, 80K BTU Net IBR Capacity. Includes Circulator.
4% Buy This
$2,239.00
Only 5 In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Noritz NRCB180DV-NG
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 100K BTU Gross Input, 92K BTU DOE Capacity, 80K BTU Net IBR Capacity. Includes Circulator.
4% Buy This
$2,239.00
Factory-Direct
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Bosch Thermotechnology ZWB35-3
Model ZWB35-3 is a Recommended Product
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 132K BTU Gross Input, 117K BTU DOE Capacity, 103K BTU Net IBR Capacity. Includes Circulator.
4% Buy This
$3,329.00
Factory-Direct
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Rinnai M160CN
Rinnai
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 160K BTU Gross Input, 148K BTU DOE Capacity, 129K BTU Net IBR Capacity. Includes Circulator.
4% Buy This
$2,991.95
Only 3 In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Weil-McLain 383100040
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 112K BTU DOE Capacity, 97K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
$2,200.00
Only 5 In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Noritz NRCB199DV-NG
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 111K BTU DOE Capacity, 97K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
$2,329.00
Factory-Direct
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Burnham K2WTC-135B-6T00
Wall Mounted Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Domestic Hot Water Priority. Includes Taco Circulator. Low Nox. Ratings: 120K BTU Gross Input, 112K BTU DOE Capacity, 97K BTU Net IBR Capacity.
2% Buy This
$2,449.00
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Burnham K2WTC-180B-6T02
Wall Mounted Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Domestic Hot Water Priority. Includes Taco Circulator. Low Nox. Ratings: 180K BTU Gross Input, 169K BTU DOE Capacity, 147K BTU Net IBR Capacity.
2% Buy This
$2,970.00
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Triangle Tube INS155C
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 155K BTU Gross Input, 142K BTU DOE Capacity, 123K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
$2,199.00
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Crown Boiler Co. PHNTM135CNT1SU
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 112K BTU DOE Capacity, 97K BTU Net IBR Capacity. Includes Taco Circulator.
2% Buy This
$2,485.00
Factory-Direct
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Rinnai I120CN
Rinnai
Wall Mounted, Condensing Boiler with Zero Governor Gas Valve. Ships Packaged. Ratings: 120K BTU Gross Input, 112K BTU DOE Capacity, 97K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
$3,018.75
In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Weil-McLain 383900150
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 110K BTU Gross Input, 100K BTU DOE Capacity, 87K BTU Net IBR Capacity. Includes Circulator.
2% Buy This
$3,117.00
Only 5 In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Weil-McLain 383100030
Wall Mounted, Condensing Combi Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 80K BTU Gross Input, 75K BTU DOE Capacity, 65K BTU Net IBR Capacity. Includes Circulator.
$2,106.00
Only 3 In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount
Learn More About Williamson-Thermoflo FS-80 COMBI
Wall Mounted, Condensing Boiler with Modulating Gas Valve. Ships Packaged. Ratings: 80K BTU Gross Input, 73K BTU DOE Capacity, 63K BTU Net IBR Capacity. Includes Circulator.
$2,189.00
Was 
$2,339.00
SAVE $150.00
Only 2 In-Stock
Freight Icon
Free Shipping & Lift Gate
Learn More About Free Freight
2% Check Discount Icon
2% Check Discount
Learn More About 2% Check Discount